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Updated discussion of maximum timer value to reflect the fact 

that the default jiffy is now 4 milliseconds.
Added a FIXME.
This commit is contained in:
Michael Kerrisk 2006-04-26 04:42:14 +00:00
parent bb47b54bfb
commit a8bbb90693
1 changed files with 6 additions and 2 deletions
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8
man2/getitimer.2
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@ -149,9 +149,10 @@ representation exceeds MAX_SEC_IN_JIFFIES
(defined in (defined in
.IR include/linux/jiffies.h ), .IR include/linux/jiffies.h ),
then the timer is silently truncated to this ceiling value. then the timer is silently truncated to this ceiling value.
On Linux 2.6 on x86 (where a jiffy is 0.001 seconds), On Linux/x86 (where, since kerenl 2.6.13,
the default jiffy is 0.004 seconds),
this means that the ceiling value for a timer is this means that the ceiling value for a timer is
approximately 24.86 days. approximately 99.42 days.
On certain systems (including x86), On certain systems (including x86),
Linux kernels before version 2.6.12 have a bug which will produce Linux kernels before version 2.6.12 have a bug which will produce
@ -167,3 +168,6 @@ should fail if a
value is specified that is outside of the range 0 to 999999. value is specified that is outside of the range 0 to 999999.
However, Linux does not give an error, but instead silently However, Linux does not give an error, but instead silently
adjusts the corresponding seconds value for the timer. adjusts the corresponding seconds value for the timer.
.\" FIXME . Bugzilla report 25 Apr 2006:
.\" http://bugzilla.kernel.org/show_bug.cgi?id=6443
.\" "setitimer() should reject non-canonical arguments"